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Note Goodwill and other intangible assets (Components of other intangible assets subject to amortization) (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Finite-Lived Intangible Assets |  |
Gross Amount | $ 72,627 | $ 72,907
Finite Lived Intangible Assets Accumulated Amortization | 51,958 | 43,398
Finite-Lived Intangible Assets, Net | 20,669 | 29,509
Core deposits |  |
Finite-Lived Intangible Assets |  |
Core deposits - Gross | 37,224 | 37,224
Finite Lived Intangible Assets Accumulated Amortization | 26,070 | 22,347
Finite-Lived Intangible Assets, Net | 11,154 | 14,877
Other customer relationship |  |
Finite-Lived Intangible Assets |  |
Customer relationships - Gross | 34,915 | 35,683
Finite Lived Intangible Assets Accumulated Amortization | 25,847 | 21,051
Finite-Lived Intangible Assets, Net | 9,068 | $ 14,632
Trademarks |  |
Finite-Lived Intangible Assets |  |
Gross Amount | 488 |
Finite Lived Intangible Assets Accumulated Amortization | 41 |
Finite-Lived Intangible Assets, Net | $ 447 |

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- Definition Bank deposits belonging to an acquired bank that can be counted on as a stable source of lending funds. These deposits have the following attributes: predictable costs and low sensitivity to interest rates. This intangible asset is usually amortized over its estimated useful life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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